CVE-2026-91088
Received Received - Intake

Heap-based Buffer Overflow in GPAC URL Handler

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: VulDB

Description
A vulnerability has been found in GPAC up to f1219cde. This issue affects the function gf_url_concatenate_ex of the file utils/url.c of the component URL Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. Upgrading to version abi-16.23 is capable of addressing this issue. The identifier of the patch is afca1f1181668d85941d51ed1adf647807d5d975. It is advisable to upgrade the affected component.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-91088
EUVD
EUVD-2026-78303

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
gpac gpac to f1219cde (inc)
gpac gpac to f1219cde (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

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Executive Summary

This vulnerability is a heap-based buffer overflow in the GPAC project affecting the function gf_url_concatenate_ex in the file utils/url.c. It occurs when processing malformed URLs, leading to improper memory access. The issue is triggered during proto instantiation when reading a malformed URL field in an MP4 file.

Detection Guidance

To detect this vulnerability, check for GPAC versions up to f1219cde. Use commands like 'MP4Box -version' to identify the installed version. If vulnerable, test with a crafted MP4 file using 'MP4Box -info poc_15_info' to trigger the heap-based buffer overflow.

Impact Analysis

An attacker could exploit this vulnerability locally to cause a heap-based buffer overflow, potentially leading to crashes, data corruption, or arbitrary code execution. The impact depends on the privileges of the affected application and system.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with GDPR, HIPAA, or other standards. The vulnerability involves a heap-based buffer overflow in GPAC's URL handling, which could potentially lead to memory corruption or crashes. Such issues may indirectly affect compliance if they compromise data integrity or availability, but no explicit details are provided.

Mitigation Strategies

Upgrade GPAC to version abi-16.23 or later. Apply the patch from commit afca1f1181668d85941d51ed1adf647807d5d975 which includes bounds checks and memory safety fixes.

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